JPH06297083A - Vibrating device for filling sand for lost foam pattern casting - Google Patents

Abstract

PURPOSE:To reduce number of parts in a vibrating device for filling sand for lost foam pattern casting, to miniaturize the device by simplifying the structure, to facilitate the maintenance and to reduce the initial cost. CONSTITUTION:The lost foam pattern and the molding sand 2 are charged into a molding flask 3, and this molding flask 3 is supported so as to be shiftable in the horizontal direction with a supporting means 5 constituted with plural swivel ball composed of balls 5A and ball holders 5B supporting the ball 5A so as to be freely rotated in the whole direction. After fitting detachably a vibrating frame 8 integrally combining a vibrating means 7, 7 to outside of the molding flask 3 supported by a supporting means 5, the vibrating means 7, 7 is started, and the molding flask 3 is made to be vibrated with a prescribed amplitude and a prescribed vibrating frequency in the direction shown by the arrow marks X1, X2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disappearance model casting method in which a mold is molded and cast mainly by using a model that disappears by heating, and molding sand is densely packed in a molding frame in which the disappearance model is installed. TECHNICAL FIELD The present invention relates to a sand filling vibrating device for disappearing model casting that uniformly fills.

[0002]

2. Description of the Related Art As a conventional sand filling vibrating device for vanishing model casting, for example, the technique disclosed in Japanese Patent Publication No. 60-158950 is known. This sand filling vibrating device for vanishing model casting mainly comprises a casting frame, elastic supporting means for elastically supporting the casting frame only in horizontal movement, and vibrating means for vibrating the casting frame in the horizontal direction. is doing. That is, the conventional sand filling vibrating apparatus for vanishing model requires elastic supporting means having a relatively complicated structure and a large number of parts for elastically supporting the casting frame so that it can only move horizontally. Further, in order to properly apply the vibration of the vibrating means to the flask, they must be held so that the relative position of the vibrating means and the flask does not shift. Therefore, a vibrating means holding mechanism that properly holds the vibrating means without displacement and a flask holding mechanism that properly holds the casting frame at the supporting position of the flask by the elastic supporting means are also separately provided. You will need it. That is, the conventional sand-filled vibrating apparatus for vanishing model casting has the drawback of increasing the size of the apparatus because of the large number of parts and the complicated structure. Therefore, the maintenance becomes complicated and there is a problem that the initial cost is increased.

[0003]

The problem to be solved is that the conventional sand-filled vibrating device has a large number of parts and a complicated structure, which leads to an increase in size of the device. In addition, maintenance becomes complicated and initial cost increases.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, a casting flask containing a vanishing model and foundry sand, and the casting flask at least horizontal 1
Supporting means for movably supporting in the axial direction, a vibrating frame removably fitted to and supported by the casting frame, and a vibrating frame integrally coupled to the vibrating frame to fix the casting frame through the vibrating frame. And a vibrating means for vibrating in at least one horizontal axis direction with an amplitude and a predetermined vibration frequency. The number of parts is reduced and the structure is simplified, and the device is downsized. , Achieved the purpose of facilitating maintenance and reducing initial cost.

[0005]

According to the present invention, with respect to the casting frame which is movably supported at least in the horizontal uniaxial direction by the supporting means,
By vibrating and supporting the vibrating frame externally and then activating the vibrating means integrally connected to the vibrating frame, at least a horizontal uniaxial oscillating force is generated. The vibrating force causes the casting frame on the supporting means to vibrate at least in the horizontal uniaxial direction with a predetermined amplitude and a predetermined vibration frequency. This vibration is transmitted to the molding sand in the casting frame to move and displace the molding sand, and the molding sand can be filled with a predetermined density.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of a sand filling vibration device for vanishing model casting according to the present invention. In this figure, a casting frame 3 in which the vanishing model 1 and the foundry sand 2 are placed is a carry-in conveyor 4
Is sent in the direction of arrow A by means of the above and is carried into the support means 5 installed at the casting sand filling position, where the molding sand 2 is filled with a predetermined packing density, and then sent in the direction of arrow B by the carry-out conveyor 6. It is carried out to the next process. Flask 3
Is formed in the shape of a bottomed rectangular tube having an open upper portion, and a supporting step portion 3A that juts out horizontally is provided so as to project over substantially the entire circumference of the central portion in the height direction. The support means 5 is composed of a plurality of free balls,
Each free ball is composed of a ball 5A and a ball holder 5B that supports the ball 5A so that the ball 5A is rotatable in all directions with the upper portion of the ball 5A protruding.

A vibrating frame 8 in which the vibrating means 7 and 7 are integrally coupled is detachably fitted onto the casting frame 3. That is, the vibrating frame 8 is formed in a rectangular shape having an inner size that can be detachably fitted onto the casting frame 3, and the vibrating means 7, 7 are attached to the two side surfaces facing each other. The vibrating means 7, 7 are
It is configured by a known compressed air drive type, electric drive type, electromagnetic drive type, or the like. Further, the vibrating frame 8 moves vertically from a standby position shown by an imaginary line to a working position shown by a solid line, that is, a position supported by the supporting stepped portion 3A of the casting frame 3 by an elevating means such as a hoist (not shown). It is configured to be possible.

In the above construction, the casting flask 3 is carried into the supporting means 5 by the carry-in conveyor 4 and stopped and supported at the casting sand filling position shown in the figure. At this time, the vibrating frame 8 at the standby position shown by the phantom line is lowered by an elevating means such as a hoist (not shown), and as shown by the solid line, the vibrating frame 8 is not supported by the supporting step portion 3A and is outside the casting frame 3. Be fitted. After the outer fitting of the casting frame 3 is completed, the vibrating means 7, 7 are activated. Vibrating means 7,
The exciting force generated by the activation of 7 is transmitted to the casting frame 3 via the vibrating frame 8 and vibrates the casting frame 3 in the horizontal 1-axis direction (see arrows X1 and X2) at a predetermined amplitude and a predetermined vibration frequency. Let This vibration is also transmitted to the foundry sand 2 in the casting frame 5 to move and displace the foundry sand 2 to fill the foundry sand 2 at a predetermined density. When the filling of the molding sand 2 with a predetermined density is completed, the vibrating frame 8 is lifted to the standby position of the imaginary line by the above-mentioned elevating means, and then the carrying frame 6 carries the molding frame 3 from the supporting means 5 to the next step. do it.

As described above, the ball 5A and the support means 5 composed of a plurality of free balls formed by the ball holder 5B that rotatably supports the ball 5A in all directions with the upper portion of the ball 5A projected. Vibration can be applied while the casting flask 3 is supported. That is, the structure of the supporting means 5 can be simplified as compared with the conventional elastic supporting means.
Moreover, since the vibrating means 7, 7 are integrally connected to the vibrating frame 8, the relative positions of the vibrating means 7, 7 and the casting frame 3 will not be displaced. Therefore, the vibrating means holding mechanism, the flask holding mechanism, and the like, which are required in the conventional apparatus, are unnecessary. That is, the present invention can reduce the number of parts and simplify the structure to realize the downsizing of the device as compared with the conventional device, and also facilitate the maintenance and reduce the initial cost. Can be

In the above-described embodiment, the vibrating means 7, 7 are attached to the two side surfaces of the vibrating frame 8 facing each other, and the casting frame 3 is horizontally moved at a predetermined amplitude and a predetermined vibration frequency by the activation of the vibrating means 7, 7. Although the description has been given with the configuration of vibrating only in the one-axis direction (see arrows X1 and X2), as shown in FIG. 2, four side surfaces of the vibrating frame 8 facing each other (however, in FIG. 2, only three side surfaces are shown. By attaching the vibrating means 7 and 7 to the horizontal direction indicated by the arrows X1 and X2 and the horizontal two-axis direction of the horizontal directions indicated by the symbols Y1 and Y2 and orthogonal to the arrows X1 and X2. The frame 3 can be vibrated with a predetermined amplitude and a predetermined vibration frequency.

The vibrating frame 8 is supported by a supporting step portion 3A formed by horizontally projecting over substantially the entire center of the casting frame 3 in the height direction. As shown, the casting frame 3 is formed in a truncated quadrangular pyramid shape, and the inner surface of the vibrating frame 8 to which the vibrating means 7 and 7 are attached is formed into an inclined surface 8A corresponding to the outer surface inclination of the casting frame 3. Alternatively, the vibrating frame 8 may be detachably fitted to and supported by the casting frame 3. Further, as shown in FIG. 4, the casting frame 3 is formed in a truncated quadrangular pyramid shape, and the inside dimension of the vibrating frame 8 to which the vibrating means 7 and 7 are attached is slightly larger than the outside dimension of the casting frame 3. And then the flask 3
By driving the wedge 9 detachably into the gap between the vibration frame 8 and
The vibrating frame 8 may be detachably fitted to and supported by the casting frame 3. Even if these supporting structures are adopted, it is possible to obtain the same actions and effects as those of the embodiments of FIGS. 1 and 2.

The present invention can be applied not only to the sand filling work when casting the vanishing model 1 described above, but also to the sand filling work when manufacturing the self-hardening mold core.

[0013]

As described above, according to the present invention, the vibrating frame is externally fitted and supported on the casting frame which is movably supported at least in the horizontal uniaxial direction by the supporting means, and then integrated with the vibrating frame. By activating the coupled vibrating means, the flask on the supporting means is vibrated at least in the horizontal uniaxial direction with a predetermined amplitude and a predetermined vibration frequency, and the molding sand is filled with a predetermined density. Therefore, the structure of the supporting means can be simplified as compared with the elastic supporting means used in the conventional device. Moreover, since the vibrating means is integrally connected to the vibrating frame, the relative position between the vibrating means and the casting frame does not shift. Therefore, the vibrating means holding mechanism, the flask holding mechanism, and the like, which are required in the conventional apparatus, are unnecessary. Therefore, compared to conventional devices,
By reducing the number of parts and simplifying the structure, it is possible to realize the miniaturization of the device, facilitate maintenance, and reduce the initial cost.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a sand filling vibrating device for vanishing model casting according to the present invention.

FIG. 2 is a front view showing a second embodiment of a sand filling vibrating device for vanishing model casting according to the present invention.

FIG. 3 is a front view showing a modified example of the outer fitting support means of the vibrating frame with respect to the casting frame.

FIG. 4 is a front view showing another modification of the external fitting support means for the vibrating frame with respect to the casting frame.

[Explanation of symbols]

 1 Disappearance model 2 Foundry sand 3 Casting frame 5 Casting frame support means 7 Vibrating means 8 Vibrating frame

Claims (1)

[Claims] 1. A casting flask containing a vanishing model and foundry sand,
Supporting means for supporting the casting frame so as to be movable in at least one horizontal axis, a vibrating frame which is detachably fitted and supported on the casting frame, and a vibrating frame integrally coupled to the vibrating frame via the vibrating frame. And a vibrating means for vibrating the flask at least in one horizontal axis direction with a predetermined amplitude and a predetermined vibration frequency.